package com.credit.jumu.calculator.utils;

import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;

/**
 * Created by Administrator on 2017/11/27/027.
 */

public class MoneyTextWatcher implements TextWatcher {
	private EditText editText;
	private int digits = 2;

	public MoneyTextWatcher(EditText et) {
		editText = et;
	}
	public MoneyTextWatcher setDigits(int d) {
		digits = d;
		return this;
	}


	@Override
	public void beforeTextChanged(CharSequence s, int start, int count, int after) {

	}

	@Override
	public void onTextChanged(CharSequence s, int start, int before, int count) {
		//删除“.”后面超过2位后的数据
		if (s.toString().contains(".")) {
			if (s.length() - 1 - s.toString().indexOf(".") > digits) {
				s = s.toString().subSequence(0,
						s.toString().indexOf(".") + digits+1);
				editText.setText(s);
				editText.setSelection(s.length()); //光标移到最后
			}
		}
		//如果"."在起始位置,则起始位置自动补0
		if (s.toString().trim().substring(0).equals(".")) {
			s = "0" + s;
			editText.setText(s);
			editText.setSelection(2);
		}

		//如果起始位置为0,且第二位跟的不是".",则无法后续输入
		if (s.toString().startsWith("0")
				&& s.toString().trim().length() > 1) {
			if (!s.toString().substring(1, 2).equals(".")) {
				editText.setText(s.subSequence(0, 1));
				editText.setSelection(1);
				return;
			}
		}
	}

	@Override
	public void afterTextChanged(Editable s) {

	}
}

